Odometer, which gear question?

[Koizumi]

Odometer crapped out whilst in Covid storage.

I reset trip to zero before storage. Now it’s stuck at zero (and mileage frozen) after taking her out for a spin today.

Before I tear the Speedo apart, I’d like to know which one is the main trip odometer reset gear? I’d like to buy the gear but of course there are like 4 or 5 ones with differing amounts of gear teeth.

I would assume since I reset the trip, and now failure, it’s the usual suspect gear. But which one is it on pelican parts?

Car is US 1984 and here’s my Speedo:

Edit:

20x30?

[Koizumi]

Seems like I answered my own question lol

New 20x30 gear on its way to my odometer guts.

[pete3799]

If you're saying both the trip meter and the odometer are not working it could be a wiring problem.
Usually a broken gear only affects the trip meter.

[Koizumi]

Originally Posted by pete3799

If you're saying both the trip meter and the odometer are not working it could be a wiring problem.
Usually a broken gear only affects the trip meter.

That’s an interesting point. I will say this, the odometer (both mileage and trip) were working fine just prior to putting the car to rest for 6 weeks. The car hasn’t moved since then at all. It’s been hibernating under a blanket in my garage.

I haven’t tinkered with anything at all either.

[Koizumi]

Just what I had thought!

I didn’t reset the trip odometer whilst moving. It prolly was slowly losing its geriatric teeth.

Was easy to get to. No big deal.

Now I await delivery of the gear from our host for reassembly.

All for less than $40 to easily repair

[x98boardwell]

I just had this happen and actually still trying to fix for good. I opened it up to replace the gear just like you. Fixed it during covid and then got the car back on the road after restoration, its an 87'.

Took it for a drive and realized it wasn't working still. So, took it apart again. Once inside I looked to see why the trip-gear was locking and preventing the odometer from working. The cause is sometimes (1 out of every 20 maybe) while on the table when I push in the reset button it goes just past 0... the 10th of a mile zero on the trip-ometer gauge will go past zero meaning the "0" for the 1/10th side locks in place on the bottom and won't let it start again and causes the entire gauge to get locked up.

I will post a pic, I'm just unsure why it's doing it or what is actually causing this to happen. I will put it back in and then someday it will do it again and then what... lot of work each time.

Anyone know why this happened? My gear was bad as well but I'm thinking because of this issue.

How did yours turn out? Any additional issues?

Thanks,
Bryan

[x98boardwell]

Here are 2 pics. The first pic is what happens when the zero resets too far and now (in this pic) everything is locked up until I free it on the table. It locks between the white and black gear at the very bottom.

[Koizumi]

Sorry it wasn’t an easy fix. I did note lots of minuscule ‘tooth’ debris everywhere. I took a lotta time to degrease where I could, remove ground down tooth fragments etc.

I’m sure I’m not helping here but hope you work it out.

Cheers

[x98boardwell]

Thanks for the quick response. Changed my gear out as well which was a task but after following another DIY thread it made it very easy.

Back in there now addressing the issue I mentioned above. Wanted to be sure since you changed the gears you hadn't had the issue again as I was thinking maybe it would possibly point to mine..

All good, I will continue the search as to what could be causing it to reset past the true zero mark.

[Otter74]

My trip odometer and odometer froze yesterday afternoon at my last gas stop on the way home from AR, so I'll be tearing mine apart too and using this post as reference.

[917_Langheck]

Originally Posted by Otter74

My trip odometer and odometer froze yesterday afternoon at my last gas stop on the way home from AR, so I'll be tearing mine apart too and using this post as reference.

This is what you will want to reference:

[Koizumi]

It’s an easy fix, just a tad delicate. The most daunting part is opening/closing the lip. Well, the first time doing it is tedious but it’s not hard, just finicky. The damaged lip is entirely hidden once everything is put back together.

[MBAtarga]

The most daunting part is removal of the needle pointer. As careful as I thought I was - mine broke. I ended up sending my unit to John Bell for him to fix and replace the broken gear.

[Koizumi]

YMMV, I had no issues with the needle at all. I can see how it’s a little unsettling at first attempt.

[shoooo32]

Originally Posted by Otter74

My trip odometer and odometer froze yesterday afternoon at my last gas stop on the way home from AR, so I'll be tearing mine apart too and using this post as reference.

This happened to me mid rally in Arkansas! I freaked out because the pace notes were all based off the trip odometer and it wasn't going up as I was driving. I'll need to crack it open to investigate.

[917_Langheck]

My speed hand removal was a real pain. Exercise caution and it will eventually come off.

For opening the can, tape up the side of the can to near the edge of the bezel seam to minimize/prevent the track of scratches that the flat blade screwdrive will cause. A case knife would be great, but won't fit. Also tape up the front of the bezel as that is an observed surface. You want that to look nice when you are done.


Alternatively, you can send it out to one of the services, and have it cleaned and calibrated at the same time.

[Koizumi]

You can use these hand removal levers for wristwatches. Just cut a slit in a piece of paper to protect the dial (goes around the needle shaft) and gently pry with both levers. Very easy. Less than $8 on Amazon.

[917_Langheck]

I removed many a watch dial hand as an apprentice watch and clock maker; the odo hand is way more challenging to remove, as the very thin shaft is far longer, and less supported at the end than on a watch, despite similarities in the movement.

Nico does not recommend prying tools. Having been to his shop many times, his knowledge is considered valid.

[Koizumi]

Well 20+ yrs of prying hands off, it’s quite easy. And I say that as a watchmaker. And I also say it as a mechanic.

For those with apprehension, if you’re nervous to do this, you can. It’s easy.